1. SETS AND FUNCTIONS. 4. If A C B show that A U B =B (use Venn diagram). 6. Let P = = {a, b c }, Q ={g, h, x, y}and R = { a,e, f,s}. Find R\ (P Q).

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1 Two marks: 1. Define set. 2.Define the cardinality of a finite set. 3. Define the cardinality of a set 1. SETS AND FUNCTIONS 4. If A C B show that A U B =B (use Venn diagram). 5. If AC B, then find A B and A\ B (use Venn diagram). 6. Let P = = {a, b c }, Q ={g, h, x, y}and R = { a,e, f,s}. Find R\ (P Q). 7.If A = {4,6,7,8,9}, B = {2,4,6} and C = {1,2,3,4,5,6}, then find AU(B C). 8.If A = {4,6,7,8,9}, B = {2,4,6} and C = {1,2,3,4,5,6}, then find A (BUC). 9.If A = {4,6,7,8,9}, B = {2,4,6} and C = {1,2,3,4,5,6}, then find A\(C\B). 10. Given A = {a, x, y, r s}, B = {1, 3, 5, 7, - 10}, verify the commutative property of set union. 11. Verify the commutative property of set intersection for A = {l, m,n, o 2, 3, 4, 7} and B = {2, 5, 3, -2, m, n, o, p). 12. Use Venn diagram to verify (A B) U (A\B) = A. 13.Let U = { 4, 8, 12,16, 20, 24,28 }, A = { 8,16 24 } and B = { 4,16, 20, 28}. Find (AUB) 14.Let U = { 4, 8, 12,16, 20, 24,28 }, A = { 8,16 24 } and B = { 4,16, 20, 28}. Find (A B) 15. Given n (A) = = 285, n (B)= 195, n (U) = 500, n (AUB) = 410, find n(a UB ). 16.Let X = { 1, 2, 3, 4 }. Examine whether each of the relations given below is a functionfrom X to X or not. Explain. (i) f = { (2, 3), (1, 4), (2, 1), (3, 2), (4, 4) } (ii) g = { (3, 1), (4, 2), (2, 1) } (iii) h = { (2, 1), (3, 4), (1, 4), (4, 3) }

2 Define function. 19. Let A = {1, 2, 3, 4, 5}, B = N and f: A B be defined by f (x) = x 2. Find the range of f. Identify the type of function. 20. For the given function F= {(1, 3), (2, 5), (4, 7), (5, 9), (3, 1)}, write the domain and range. 21. If R= {(a, 2), (-5, b), (8, c), (d, - 1)} represents the identity function, find the values of a, b, c and d. 22. Write the pre-images of 2 and 3 in the function f = {(12, 2), (13, 3), (15, 3), (14, 2), (17, 17)}. 23. A = { 2, 1, 1, 2} and f = {(x, 1/x), x A}.Write down the range of f. Is f a function from A to A?

3 Five Marks: 1.Use Venn diagrams to verify (AUB) = A B 2.Use Venn diagrams to verify (A B) = A UB 3.Use Venn diagrams to verify De Morgan s law for set difference A\ (B C) = (A \ B) U (A \ C). 4.Use Venn diagrams to verify De Morgan s law for set difference A\ (BUC) = (A \ B) (A \ C). 5.Use Venn diagrams to verify AU(B C)= (AUB) (AUC) 6.Use Venn diagrams to verify A (BUC)= (A B)U(A C) 7.Let A = { a, b, c, d },B = { a c, e} C and = { a, e}then Verify using Venn diagram A (B C)=(A B) C 8.Let A = {0,1,2,3,4}, B = {1,- 2, 3,4,5,6} and C = {2,4,6,7} then Verify using Venn diagram AU(B C)= (AUB) (AUC) 9.Let U = { -2, -1 -, 0,1, 2, 3,..10}, A = { -2, 2,3,4,5} and B = {1,3,5, 8,9}. Verify De Morgan s laws of complementation 10.Let A = {a, b, c, d, e, f, g, x, y, z}, B = {1, 2, c d, e} and C = {d, e, f, g, 2, y}.verify A\ (BU C) = (A \ B) (A \ C) 11.Let A = {10,15, 20, 25, 30, 35, 40, 45,50}, B = { 1, 5,10,15, 20, 30} and C = { 7, 8, 15, 20, 35, 45, 48}. Verify A\ (B C) = (A \ B) U (A \ C). 12.In a survey of university students, 64 had taken mathematics course, 94 had taken Computer science course, 58 had taken physics course, 28 had taken mathematics and physics, 26 had taken mathematics and computer science, 22 had taken computer science and physics course, and 14 had taken all the three courses. Find the number of students who were surveyed. Find how many had taken one course only. 13. An advertising agency finds that, of its 170 clients, 115 use Television, 110 use Radioand13use Magazines. Also, 85 use Television and Magazines, 75 use Televisionand Radio, 95useRadio and Magazines, 70 use all the three. Draw Venn diagram torepresent these data. Find (i) how many use only Radio? (ii) how many use only Television? (iii) how many use Television and magazine but not radio?

4 14.A radio station surveyed 190 students to determine the types of music they liked.the survey revealed that 114 liked rock music, 50 liked folk music, and 41 liked classicalmusic, 14 liked rock music and folk music, 15 liked rock music and classical music, 11 likedclassical music and folk music. 5 liked all the three types of music. Find (i) how many did not like any of the 3 types? (ii) how many liked any two types only? (iii) how many liked folk music but not rock music? 15.In a school of 4000 students, 2000 know French, 3000 know Tamil and 500 know Hindi,1500 know French and Tamil, 300 know French and Hindi, 200 know Tamil and Hindi and 50 know all the three languages. (i) How many do not know any of the three languages? (ii) How many know at least one language? (iii) How many know only two languages? 16.In a college, 60 students enrolled in chemistry, 40 in physics, 30 in biology, 15 in chemistryand physics, 10 in physics and biology, 5 in biology and chemistry. No one enrolled in all the three. Find how many are enrolled in at least one of the subjects 17.In a town 85% of the people speak Tamil, 40% speak English and 20% speak Hindi. Also, 32% speak English and Tamil, 13% speak Tamil and Hindi and 10% speak English and Hindi, find the percentage of people who can speak all the three languages. 18. In a village of 120 families, 93 families use firewood for cooking, 63 families use kerosene, 45 families use cooking gas, 45 families use firewood and kerosene, 24 families use kerosene and cooking gas, 27 families use cooking gas and firewood. Find how many use firewood, kerosene and cooking gas. 19 Let A= {0, 1, 2, 3} and B = {1, 3, 5, 7, 9 } be two sets. Let f : A B be a function given by f(x ) = 2x+1. Represent this function as (i) a set of ordered pairs (iii) an arrow diagram and (ii) a table (iv) a graph. 20. Let A = {6, 9, 15, 18, 21}; B = { 1, 2, 4, 5, 6 } and f :A B be defined by f(x) = x-3 3 Represent f by (i) an arrow diagram (ii) a set of ordered pairs (iii) a table (iv) a graph.

5 21.Let A = {4, 6, 8, 10} and B = { 3, 4, 5, 6, 7 }. If f :A B is defined by f(x)= 1 x + 1 then represent f by (i) an arrow diagram (ii) a set of ordered pairs and ` (iii) a table. 22. A function f : [1, 6) R is defined as follows 1+x 1 x<2 f(x)= 2x-1 2 x<4 3x x<6 Find the value of (i) f(5) (ii) f( 3) (iii) f(1 ) (iv) f (2)-f( 4) (v) 2 f(5 )-3f(1) 23. A function f : [-3, 7) R is defined as follows 4x 2-1 f(x)= 3x-2-3 x<2 2 x 4 2x-3 4<x<7 Find (i)f(5)+f(6) (ii) f(1)- f(-3) (iii) f(-2)-f(4) (iv) f(3)+f(-1) 2f(6)-f(1) 24. A function f: [-3, 7) R is defined as follows x 2 +2x+1 f(x)= x x<-5-5 x 2 x-1 2<x<6 Find (i)2f(-4)+ 3 f(2) (ii) f(-7)- f(-3) (iii) 4 f(-3)+ 2 f(4) f(-6)- 3 f(1) 25. Let A= {5, 6, 7, 8}; B = { 11, 4, 7, 10, 7, 9, 13} and f = {(x, y): y=3-2x, x є A, y є B} (i) Write down the elements of f (iii) What is the range? (ii) What is the co-domain? (iv) Identify the type of function. 2

6 Two Marks: 2. SEQUENCES AND SERIES OF REAL NUMBERS 1. Find the common difference and 15th term of the A.P. 125, 120, 115, Find the 17th term of the A.P. 4, 9, Which term of the arithmetic sequence 24, 23 1/4, 22 1/2,. is 3? 4. If a, b, c are in A.P. then prove that (a-c) 2 =4(b 2 -ac) 5. If a, b, c are in A.P. then prove that 1/bc, 1/ca, 1/ab are also in A.P. 6. How many two digit numbers are divisible by 13? 7. Which term of the geometric sequence1, 2, 4, 8,.., is 1024? 8. Find the sum of the arithmetic series Find the sum of the first 25 terms of the geometric series Find the sum of the series to 25 terms. 11. Find the sum of the series Find the sum of the series Find the sum of the series If n 3 =36100 then find n Five Marks: 1. The 10 th and 18 th terms of an A.P. are 41 and 73 respectively. Find the 27 th term. 2. The sum of three consecutive terms in an A.P. is 6 and their product is 120. Find the three numbers. 3. Find the three consecutive terms in an A. P. whose sum is 18 and the sum of their squares is The 4th term of a geometric sequence is 2/3 and the seventh term is 16/81. Find the geometric sequence.

7 5. The sum of first three terms of a geometric sequence is 13/12 and their product is -1. Find the common ratio and the terms. 6. If the 4 th and 7th terms of a G.P. are 54 and 1458 respectively, find the G.P. 7. If a, b, c, d are in geometric sequence, then prove that (b-c) 2 +(c-a) 2 +(d-b) 2 =(a-d) 2 8. Find the sum of the first 2n terms of the following series Find the sum of the first 40 terms of the following series Find the sum of all 3 digit natural numbers, which are divisible by Find the sum of all 3 digit natural numbers, which are divisible by Find the sum of all natural numbers between 300 and 500 which are divisible by Find the sum to n terms of the series Find the sum to n terms of the series If S1, S2,and S3 are the sum of first n, 2n and 3n terms of a geometric series respectively, then prove that S1(S3-S2) = (S2- S1) Find the sum of the series Find the sum of the series Find the total area of 14 squares whose sides are 11 cm, 12 cm,.., 24 cm, respectively. 19.Find the total area of 12 squares whose sides are 12 cm, 13cm,, 23cm. respectively. 20. Find the sum of the series Find the sum of the series Find the total volume of 15 cubes whose edges are 16 cm, 17 cm, 18 cm,., 30 cm respectively.

8 TWO MARKS: 1. Solve 3x - 5y = 16, 2x + 5y = ALGERBRA 2. Solve by elimination method 3x + 4y = 25, 2x - 3y = 6 3. Solve 3x + y = 8, 5x + y = 10 4.The cost of 11 pencils and 3 erasers is 50 and the cost of 8 pencils and 3 erasers is 38. Find the cost of each pencil and each eraser 5. Find a quadratic polynomial if the sum and product of zeros of it are 4 and 3 respectively. 6. Find a quadratic polynomial with zeros at x =1/4 and x = Find the quotient and remainder when x 3 +x 2-7x-2 is divided by x Find the quotient and remainder when x 3 +x 2-3x+5 is divided by x 1 9. Find the quotient and remainder when 3x 3-2x 2 +7x-5 is divided by x Find the greatest common divisor of 25bc 4 d 3, 35b 2 c 5, 45c 3 d 11. Find the GCD of the following m 2-3m-18, m 2 +5m Find the GCD of 35x 5 y 3 z 4, 49 x 2 y z3, and 14 xy 2 z Find the LCM of 35a 2 c 3 b, 42a 3 c b 2, 30ac 2 b Simplify 5x+20 7x Simplify x x x 16. Simplify x x 3 x 2 +3x+2 x 2-2x-3

9 17. Simplify x x + 3 x 2-7x+10 x 2-2x Simplify i) 6x 2-5x+1 ii) (x-3) (x 2-5x+4) 9x 2 +12x-5 (x-1) (x 2-2x-3) 19. The sum of a number and its reciprocal is 5 1. Find the number Determine the nature of roots of the following quadratic equations (i) x 2-11x-10=0 (ii) 4x 2-28x+49=0 (iii) 2x 2 +5x+5=0 21. Form the quadratic equation whose roots are and Form a quadratic equation whose roots are (i) 3, 4 (ii) 3 + 7, 3-7 (iii) 4 + 7, Five Marks: 1. Solve 3(2x + y) = 7xy; 3(x + 3y) = 11xy using elimination method. 2. If the quotient on dividing 2x 4 +x 3-14x 2-19x+6 by 2x + 1 is x3+ax 2 -bx-6 Find the values of a and b, also the remainder. 3.If the quotient on dividing x 4 +10x 3 +35x 2 +50x+29 by x + 4 is x 3 -ax 2 +bx+6 Find the values of a and b, also the remainder. 4.If the quotient on dividing 8x 4-2x 2 +6x-7 by 2x + 1 is 4x 3 +px 2 -qx+3. Find the values of p and q, also the remainde 5. Factorize 2x 3-3x 2-3x+2 into linear factors. 6. Factorize x 3-3x 2-10x Exercise 3.5 (All sum) 8. The GCD x 4 +3x 3 +5x 2 +26x+56 and x 4 +2x 3-4x 2 -x+28 is x 2 +5x+7. Find their LCM.

10 9. Simplify x 2 +3x+2 x 2 +5x+6 x 2 +4x If P = x Q = y then find 1-2Q x + y x + y P-Q P 2 -Q Find the square root of (6x 2 x 2) (3x 2 5x+2) (2x 2 x 1). 12. Exercise 3.13 (all sum) 13. The base of a triangle is 4 cm longer than its altitude. If the area of the triangle is 48 sq. cm, then find its base and altitude. 14. A car left 30 minutes later than the scheduled time. In order to reach its destination 150 km away in time, it has to increase its speed by 25 km/hr from its usual speed. Find itsusual speed. 15. A train covers a distance of 90 km at a uniform speed. Had the speed been 15 km/hr more, it would have taken 30 minutes less for the journey. Find the original speed of the train. 16. The speed of a boat in still water is 15 km/hr. It goes 30 km upstream and return down stream to the original point in 4 hrs 30 minutes. Find the speed of the stream. 17. If the equation (1+m 2 ) x 2 +2mcx+c2-a 2 =0 has equal roots, then prove that c 2 =a 2 (1+m 2 ) 18.Show that the roots of the equation 3p 2 x 2-2pqx+q 2 =0 are not real. 19. If α and β are the roots of 5x 2 -px+1=0and α - β = 1, then find p. 20. If α and β are the roots of x 2-3x-1= 0, then form a quadratic equation Whose roots are 1/ α 2 and 1/ β If are the roots of α, β are the roots of 2x 2-3x-5=0,form a equation whose roots are α 2 and β If are the roots of α, β are the roots of x 2-3x+2=0,form a equation whose roots are -α and -β.

11 23. If α and β are the roots of the equation 3x 2-5x+2= 0, then find the values of (i) α + β (ii) α β (iii) α 2 + β 2 β α β α 24. If α and β are the roots of the equation 6x 2 -x+1= 0, then find the values of (i) 1, 1 (ii) α 2 β 2, β 2 α 2 (iii) 2α+ β, 2β+ α α β 25.Example 3.52 Two Marks: 1.Define square matrix. 2. Define diagnoal matrix 3. Define transpose of a matrix. 4. Define unit matrix. 4.Matrices 5. Construct a 2 x 3 matrix A = [aij] whose elements are given by aij= 2i-3j 6. If A = then A T and (A T ) T If A = 2 3 then find the transpose of A If A = then verify that (A T ) T =A

12 9. A matrix has 8 elements. What are the possible orders it can have? 10. A matrix consists of 30 elements. What are the possible orders it can have?. 11. If A= and B = 1-1 Find A+B if it exists If A= then find the additive inverse of A Let A= 3 2 and B = 8-1 Find the matrix C If C=2A+B Let A = 4-2 and B = 8 2 find 6A-3B solve 3 2 x y If A= 1 3 then verify AI=IA=A, where I is the unit matrix A = 3 5 and B = 2-5 are multiplicative inverses to each other. 18. Find the product i) ii)

13 Five Marks: 1. If A = -2 and B = (1 3-6 ) then verify that (AB) T =B T A T If A = 5 2 andb = 2-1 then verify that (AB) T =B T A T If A = 1-1 then show that A 2-4A+5I2= If A = 3 2,B = -2 5,C = 1 1 verify that A (B +C )= AB+AC If A = a b and I = 1 0 then show that A 2 - (a + d) A= (b c-ad)i2 C d Find X and Y if 2X + 3Y = 2 3 and 3X+2Y=

14 Two Marks: 5. COORDINATE GEOMETRY 1. Find the midpoint of the line segment joining the points (3, 0) and (-1, 4). 2. The centre of a circle is at (-6, 4). If one end of a diameter of the circle is at the origin, then find the other end. 3. Find the point which divides the line segment joining the points (3, 5) and (8, 10) internally in the ratio 2: Find the coordinates of the point which divides the line segment joining (3, 4) and ( 6, 2) in the ratio 3: 2 externally. 5. Find the centroid of the triangle whose vertices are A(4, -6), B(3,-2) and C(5, 2). 6. If the centroid of a triangle is at (1, 3) and two of its vertices are (-7, 6) and (8, 5) then find the third vertex of the triangle. 8. If P(x, y) is any point on the line segment joining the points (a, 0) and (0, b) then prove that a/ x +b/y = 1, where a, b Find the slope of the straight line passing through the points (3, -2) and (-1, 4). 10. Find the equation of straight line whose angle of inclination is 45 and y-intercept is 2/ Find the equation of the straight line passing through the points (-1, 1) and (2,-4). 12. Find the equation of the straight line passing through the point (-2, 3) with slope 1/ If the x-intercept and y-intercept of a straight line are 2/3 and 3/4 respectively, then find the equation of the straight line. 14. Find the x and y intercepts of the straight line (i) 5x+3y - 15 = 0 (ii) 2x -y +16 = 0 (iii) 3x+10 y+ 4 = Show that the straight lines 3x+2 y- 12 = 0 and 6x +4y + 8 = are parallel.

15 16. Prove that the straight lines x + 2y+ 1 = 0 and 2x- y +5 = 0 are perpendicular to each other. 17. Find the equation of the straight line parallel to the line x 8y+ 13 =0 and passing through the point (2, 5). Five Marks: 1. If C is the midpoint of the line segment joining A (4, 0) and B(0, 6) and if O is the origin, then show that C is equidistant from all the vertices of OAB. 2. Find the area of the triangle formed by joining the midpoints of the sides of a triangle whose vertices are(0,-1), (2,1) and (0,3). Find the ratio of this area to the area of the given triangle. 3. Find the area of the triangle whose vertices are (i) (1, 2), (-3, 4), and (-5,-6) (ii) (5, 2), (3, -5) and (-5, -1) (iii) (-4, -5), (4, 5) and (-1, -6) 4. If the area of the ABC is 68 sq.units and the vertices are A(6,7), B(-4, 1) and C(a, 9) taken in order, then find the value of a. 5. Find the area of the quadrilateral whose vertices are (i)(-4, -2), (-3, -5), (3, -2) and (2, 3) (ii) (6, 9), (7, 4),(4,2) and (3,7) (iii) (-3, 4), (-5,- 6), (4,- 1) and (1, 2) (iv) (-4, 5), (0, 7), (5,- 5)and (-4,- 2) 6. Using the concept of slope, show that the points A(5, -2), B(4, -1) and C(1, 2) are collinear. 7. Using the concept of slope, show that the points (-2, -1), (4, 0), (3, 3) and (-3, 2) taken in order form a parallelogram 8. Using the concept of slope, show that the vertices (1, 2), (-2, 2), (-4, -3) and (-1, -3) taken in order form a parallelogram. 9. The vertices of a ABC are A(1, 2), B(-4, 5) and C(0, 1). Find the slopes of the altitudes of the triangle. 10. The vertices of ABC are A(1, 8), B(-2, 4), C(8, -5). If M and N are the midpoints of AB and AC respectively, find the slope of MN and hence verify that MN is parallel to BC.

16 11. The vertices of a ABC are A(2, 1), B(-2, 3) and C(4, 5). Find the equation of the median through the vertex A. 16. The vertices of ABC are A (2, 1), B (6, 1) and C(4, 11). Find the equation of the straight line along the altitude from the vertex A. 17. If the vertices of a ABC are A (2, -4), B (3, 3) and C(-1, 5). Find the equation of the straight line along the altitude from the vertex B. 12. Find the equations of the straight lines each passing through the point (6, -2) and whose sum of the intercepts is Find the equation of the straight lines passing through the point (2, 2) and the sum of the intercepts is Find the equation of the perpendicular bisector of the straight line segment joining the points (3, 4) and (-1, 2) 14. If x+2y=7 and 2x+ y =8 are the equations of the lines of two diameters of a circle, find the radius of the circle if the point (0, -2) lies on the circle. 15. Find the equation of the straight line joining the point of intersection of the lines 3x- y +9 = 0 and x+2 y =4 and the point of intersection of the lines 2x+ y - 4 = 0 and x -2y+ 3 = Find the equation of the straight line passing through the point of intersection of the lines 2x +y -3 = 0 and 5x+y -6 = 0 and parallel to the line joining the points (1, 2) and (2, 1). 20. Find the equation of the straight line which passes through the point of intersection of the straight lines 5x-6 y =1 and 3x+2 y+ 5 =0and is perpendicular to the straight line 3x-5y + 11 = Find the equation of the straight line segment whose end points are the point of intersection of the straight lines 2x- 3 y + 4 =0, x-2 y +3 = 0 and the midpoint of the line joining the points (3, -2) and (-5, 8).

17 Two Marks: 6. GEOMETRY 1. In ABC, DE BC and DB = 3 If AE = 3.7 cm, find EC. AD 2 2. In a ABC, D and E are points on the sides AB and AC respectively such that DE BC (i) If AD = 6 cm, DB = 9 cm and AE = 8 cm, then find AC. (ii) If AD = 8 cm, AB = 12 cm and AE = 12 cm, then find CE 3. In ABC, AE is the external bisector of A, meeting BC produced at E. If AB = 10 cm, AC = 6 cm and BC = 12 cm, then find CE. 4. In a ABC, AD is the internal bisector of A, meeting BC at D. (i) If BD = 2 cm, AB = 5 cm, DC = 3 cm find AC. (ii) If AB = 5.6 cm, AC = 6 cm and DC = 3 cm find BC. 5. AB and CD are two chords of a circle which intersect each other internally at P. (i) If CP = 4 cm, AP = 8 cm, PB = 2 cm, then find PD. (ii) If AP = 12 cm, AB = 15 cm, CP = PD, then find CD 6. AB and CD are two chords of a circle which intersect each other externally at P (i) If AB = 4 cm BP = 5 cm and PD = 3 cm, then find CD. (ii) If BP = 3 cm, CP = 6 cm and CD = 2 cm, then find AB 5. Let PQ be a tangent to a circle at A and AB be a chord. Let C be a point on the circle such that BAC = 54 and BAQ = 62 Find ABC. Five Marks: 1. State and prove Basic Proportionality theorem. 2. State and prove Angle bisector theorem. 3. State and Prove Pythagoras theorem.

18 7.2Trigonometric identities 2 Marks: 7. TRIGONOMETRY 1. Prove the identity Sin Ө + Cos Ө = 1 Cosec Ө Sec Ө 2. Prove the identity 1- Cos Ө = Cosec Ө- Cot Ө 1+Cos Ө 2. Prove the identity 1- Sin Ө = Sec Ө- tan Ө 1+Sin Ө 4. Prove the identity (Sin 6 Ө+Cos 6 Ө) = 1-3Sin 2 Ө Cos 2 Ө 5. Prove the identity 1+Sec Ө = Sin 2 Ө Sec Ө 1-Cos Ө 6. Prove the identity Sin Ө = Cosec Ө + Cot Ө 1-Cos Ө 7. Sec 2 Ө+ Cosec 2 Ө = Sec 2 Ө+ Cosec 2 Ө 8. A kite is flying with a string of length 200 m. If the thread makes an angle 30 with the ground, find the distance of the kite from the ground level. 9. A ladder leaning against a vertical wall, makes an angle of 60 with the ground. The foot of the ladder is 3.5 m away from the wall. Find the length of the ladder. 10. A ramp for unloading a moving truck, has an angle of elevation of 30. If the top of the ramp is 0.9 m above the ground level, then find the length of the ramp. 11. Find the angular elevation (angle of elevation from the ground level) of the Sun when the length of the shadow of a 30 m long pole is 10 3 m. 12. A girl of height 150 cm stands in front of a lamp-post and casts a shadow of length cm on the ground. Find the angle of elevation of the top of the lamp-post.

19 5 Marks: 1. Prove the identity (Sin Ө+ Cosec Ө) 2 +(Cos Ө + Sec Ө) 2 = 7+ tan 2 Ө+ Sec 2 Ө 2. If tan Ө + Sin Ө = m and tan Ө - Sin Ө = n, then show that m 2 -n 2 = 4 mn 3. If x = a Sec Ө+ b tan Ө, y = a tan Ө + b Sec Ө then prove that x 2 -y 2 =a 2 -b 2 4. A jet fighter at a height of 3000 m from the ground, passes directly over another jet fighter at an instance when their angles of elevation from the same observation point are 60 o and 45 0 respectively. Find the distance of the first jet fighter from the second jet at that instant. 5. A vertical wall and a tower are on the ground. As seen from the top of the tower, the angles of depression of the top and bottom of the wall are 45 o and 60 o respectively. Find theheight of the wall if the height of the tower is 90 m. 6. A person in an helicopter flying at a height of 700 m, observes two objects lying opposite to each other on either bank of a river. The angles of depression of the objects are 30 o and 45 o. Find the width of the river. 7. A student sitting in a classroom sees a picture on the black board at a height of 1.5 m from the horizontal level of sight. The angle of elevation of the picture is 30c. As the picture is not clear to him, he moves straight towards the black board and sees the picture at an angle of elevation of 45c. Find the distance moved by the student. Two marks: 8. MENSURATION 1. A solid right circular cylinder has radius 7 cm and height 20 cm. Find its curved surface area. 2. A solid right circular cylinder has radius 7 cm and height 20 cm. Find its total surface area. 3. Radius and slant height of a solid right circular cone are 35 cm and 37 cm respectively. Find the curved surface area 4. Radius and slant height of a solid right circular cone are 35 cm and 37 cm respectively. Find the total surface area of the cone.

20 5. Total surface area of a solid hemisphere is 675π sq.cm. Find the curved surface area of the solid hemisphere. 6. If the circumference of the base of a solid right circular cone is 236 cm and its slant height is 12 cm, find its curved surface area. 7. Find the volume of a sphere-shaped metallic shot-put having diameter of 8.4 cm 8. If the volume of a solid sphere is /7 cu.cm, then find its radius. 9. Find the volume of a solid cylinder whose radius is 14 cm and height 30 cm. 10. Radius and slant height of a cone are 20 cm and 29 cm respectively. Find its volume 11. The circumference of the base of a 12 m high wooden solid cone is 44 m. Find the volume. 12. The volume of a cone with circular base is 216 π cu.cm. If the base radius is 9 cm, then find the height of the cone. 13. The volume of a solid hemisphere is 1152 cu.cm. Find its curved surface area 14. Find the volume of the largest right circular cone that can be cut out of a cube whose edge is 14 cm. Five Marks: 1. The diameter of a road roller of length 120 cm is 84 cm. If it takes 500 complete revolutions to level a playground, then find the cost of levelling it at the cost of 75 paise per square metre. 2. A sector containing an angle of 120 is cut off from a circle of radius 21 cm and folded into a cone. Find the curved surface area of the cone.. 3. The total surface area of a solid right circular cylinder is 1540 cm2. If the height is four times the radius of the base, then find the height of the cylinder.` 4. The radii of two circular ends of a frustum shaped bucket are 15 cm and 8 cm. If its depth is 63 cm, find the capacity of the bucket in litres. 5. The perimeter of the ends of a frustum of a cone are 44 cm and 8.4 π cm. If the depth is 14 cm., then find its volume

21 6. A vessel is in the form of a frustum of a cone. Its radius at one end and the height are 8 cmand 14 cm respectively. If its volume is 5676 cm3, then find the radius at the other end Volume of a hollow sphere is 11352/7 cm 3. If the outer radius is 8 cm, find the inner radius of the sphere. 8.The internal and external radii of a hollow cylinder are 12 cm and 18 cm respectively. If its height is 14 cm, then find its curved surface area and total surface area. 9. Using clay, a student made a right circular cone of height 48 cm and base radius 12 cm. Another student reshapes it in the form of a sphere. Find the radius of the sphere. 10. A spherical solid material of radius 18 cm is melted and recast into three small solid spherical spheres of different sizes. If the radii of two spheres are 2cm and 12 cm, find the radius of the third sphere. 11. An iron right circular cone of diameter 8 cm and height 12 cm is melted and recast into spherical lead shots each of radius 4 mm. How many lead shots can be made? 12. A cylindrical bucket of height 32 cm and radius 18 cm is filled with sand. The bucket is emptied on the ground and a conical heap of sand is formed. If the height of the conical heap is 24 cm, find the radius and slant height of the heap. 13. A cylindrical shaped well of depth 20 m and diameter 14 m is dug. The dug out soil is evenly spread to form a cuboid-platform with base dimension 20 m X 14 m. Find the height of the platform. 14. A right circular cylinder having diameter 12 cm and height 15 cm is full of ice cream. The ice cream is to be filled in cones of height 12 cm and diameter 6 cm, having a hemispherical shape on top. Find the number of such cones which can be filled with the ice cream available. 15. A solid wooden toy is in the form of a cone surmounted on a hemisphere. If the radii of the hemisphere and the base of the cone are 3.5 cm each and the total height of the toy is 17.5 cm, then find the volume of wood used in the toy. 16. A cup is in the form of a hemisphere surmounted by a cylinder. The height of the cylindrical portion is 8 cm and the total height of the cup is 11.5 cm. Find the total surface area of the cup. 17. A circus tent is to be erected in the form of a cone surmounted on a cylinder. The total height of the tent is 49 m. Diameter of the base is 42 m and height of the cylinder is 21 m. Find the cost of canvas needed to make the tent, if the cost of canvas is `12.50/m 2

22 18. A hollow sphere of external and internal diameters of 8 cm and 4 cm respectively is melted and made into another solid in the shape of a right circular cone of base diameter of 8 cm. Find the height of the cone. 19. Spherical shaped marbles of diameter 1.4 cm each are dropped into a cylindrical beaker of diameter 7 cm containing some water. Find the number of marbles that should be dropped into the beaker so that the water level rises by 5.6 cm. 20. A hollow cylindrical iron pipe is of length 28 cm. Its outer and inner diameters are 8 cm and 6 cm respectively. Find the volume of the pipe and weight of the pipe if 1 cu.cm of iron weighs 7 gm 21.A cuboid shaped slab of iron whose dimensions are 55 cm#40 cm#15 cm is melted and recast into a pipe. The outer diameter and thickness of the pipe are 8 cm and 1 cm respectively.find the length of the pipe.

23 Two Marks: 11. STATISTICS 1. Find the range and the coefficient of range of 43, 24, 38, 56, 22, 39, The largest value in a collection of data is If the range is 2.26, then find the smallest value in the collection. 3. The smallest value of a collection of data is 12 and the range is 59. Find the largest value of the collection of data. 4. Find the standard deviation of the first 10 natural numbers. 5. Calculate the standard deviation of the first 13 natural numbers. 6. If the coefficient of variation of a collection of data is 57 and its S.D is 6.84, then find the mean. 7. A group of 100 candidates have their average height cm with coefficient of variation 3.2. What is the standard deviation of their heights Five Marks: 1. Find the standard deviation of the numbers 62, 58, 53, 50, 63, 52, Calculate the standard deviation of the following data. (i) 10, 20, 15, 8, 3, 4 (ii) 38, 40, 34, 31, 28, 26, Find the coefficient of variation of the following data. 18, 20, 15, 12, Calculate the coefficient of variation of the following data: 20, 18, 32, 24, Calculate the standard deviation of the following data. x f Find the standard deviation of the following distribution. x f

24 7. Find the variance of the following distribution. Class interval Frequency The time (in seconds) taken by a group of people to walk across a pedestrian crossing is given in the table below. Time (in sec.) No. of people Calculate the variance and standard deviation of the data. 9. A group of 45 house owners contributed money towards green environment of their street. The amount of money collected is shown in the table below. Amount (Rs) 0-20 No. of house owners Calculate the variance and standard deviation. 10. Find the variance of the following distribution Class interval Frequency For a collection of data, if x = 35, n = 5, (x-9) 2 then find x 2 and (x-x) The mean of 30 items is 18 and their standard deviation is 3. Find the sum of all theitems and also the sum of the squares of all the items

25 Two Marks: 12. PROBABILITY 1. An integer is chosen from the first twenty natural numbers. What is the probability that it is a prime number? 2. There are 7 defective items in a sample of 35 items. Find the probability that an item chosen at random is non-defective. 4. A ticket is drawn from a bag containing 100 tickets. The tickets are numbered from one to hundred. What is the probability of getting a ticket with a number divisible by 10? 5. A die is thrown twice. Find the probability of getting a total of Three rotten eggs are mixed with 12 good ones. One egg is chosen at random. What is the probability of choosing a rotten egg? 7. Two coins are tossed together. What is the probability of getting at most one head. 8-. Three coins are tossed simultaneously. Find the probability of getting (i) at least one head (ii) exactly two tails (iii) at least two heads. 9. A two digit number is formed with the digits 3, 5 and 7. Find the probability that the number so formed is greater than 57 (repetition of digits is not allowed). 10. Three dice are thrown simultaneously. Find the probability of getting the same number on all the three dice. 11. If A and B are mutually exclusive events such that P (A) = 3/5 P (B) =1/5then find P (AUB). 12. If A and B are two events such that find P (A) = 1/4 P (B) =2/5 and P (AUB)=1/2 then find P (A B). Five Marks: 1. Two unbiased dice are rolled once. Find the probability of getting (i) a sum 8 (ii) a doublet (iii) a sum greater than Three coins are tossed simultaneously. Using addition theorem on probability, find the probability that either exactly two tails or at least one head turn up. 3. A die is thrown twice. Find the probability that at least one of the two throws comes up with the number 5.

26 4. If a die is rolled twice, find the probability of getting an even number in the first time or a total of 8 5. Two dice are rolled simultaneously. Find the probability that the sum of the numbers on the faces is neither divisible by 3 nor by A bag contains 10 white, 5 black, 3 green and 2 red balls. One ball is drawn at random. Find the probability that the ball drawn is white or black or green. 7. A two digit number is formed with the digits 2, 5, 9 (repetition is allowed). Find the Probability that the number is divisible by 2 or One number is chosen randomly from the integers 1 to 50. Find the probability that it is divisible by 4 or The probability that a girl will be selected for admission in a medical college is The probability that she will be selected for admission in an engineering college is 0.24 and the probability that she will be selected in both, is (i) Find the probability that she will be selected in at least one of the two colleges. (ii) Find the probability that she will be selected either in a medical college only or in an engineering college only. 10. The probability that a new car will get an award for its design is 0.25, the probability that it will get an award for efficient use of fuel is 0.35 and the probability that it will get both the awards is Find the probability that (i) it will get at least one of the two awards (ii) it will get only one of the awards. 11. The probability that A, B and C can solve a problem are 4/5, 2/3, 3/7and respectively. The probability of the problem being solved by A and B is 8/15, B and C is 2/7, A and C is 12/35. The probability of the problem being solved by all the three is 8/35. Find the probability that the problem can be solved by at least one of them. Prepared by S.MURUGAVEL M.Sc., B.Ed., murugavel213@gmail.com Website: